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Table 5 ROC curve analysis for DVH parameters of the small bowel loops in relation to grade 1–2 chronic GI complications

From: Dose-volume histogram predictors of chronic gastrointestinal complications after radical hysterectomy and postoperative intensity modulated radiotherapy for early-stage cervical cancer

  Optimal threshold
  AUC 95% CI Value Sensitivity/specificity (%)
Maximum dose 0.637 0.503-0.770 5586 cGy 64.3/67.9
V40 ratio 0.670 0.540-0.800 0.28 67.9/57.1
  1. Abbreviations: AUC = area under the ROC curve; CI = confidence interval; DVH = dose-volume histogram; GI = gastrointestinal; ROC = receive operating characteristics; V30-50 volume = volume receiving more than respective dose; V30-50 ratio = volume receiving more than respective dose to total volume.